Answer to Question #185877 in Algebra for Eleine

Question

What should be come in place of x in the following series: 2, 2, 4, 12, 48, 240, x?

Answer 1

Solution

The next numbers in the series is obtained by multiplying the previous digit with the index of the number to be determined.

The index in the series follows the order 0,1,2,3... Such that the first 2 correspond with 0 and the second one with 1.

Hence x is index 6 and previous digit is 240

Therefore, x= 240* 6= 1440